Short design descriptions of other systems of the HTTR

Sakaba, Nariaki; Furusawa, Takayuki; Kawamoto, Taiki; Ishii, Yoshiki; Oota, Yukimaru

doi:10.1016/j.nucengdes.2004.08.024

Cited by 16 publications

(7 citation statements)

References 6 publications

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“…It is considered that the events in 1997 and 1998 were initial failures or occurred due to adjusting systems and components. In terms of individual systems, the instrumentation and control system [4] and the auxiliary reactor system [5] had many events. Figure 1 shows that, from 1999 to 2001, the number of events gradually decreased.…”

Section: Trends In Registered Eventsmentioning

confidence: 99%

Operation and maintenance experience from the HTTR database

Shimizu

Furusawa

Homma

et al. 2014

Journal of Nuclear Science and Technology

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The Japan Atomic Energy Agency has been establishing a database of operation and maintenance experience for the High Temperature Engineering Test Reactor. The objective of this database is to share information from operation and maintenance experience and make use of the knowledge gained in the design, construction, and operation of future High Temperature Gas-cooled Reactors (HTGRs). Between 1997 and 2012, more than 1000 events have been registered in this database system. This paper describes trends in operation and maintenance events recorded in this database, including experience gained from the Great East Japan Earthquake. The paper also identifies the following significant items that are expected to be useful in the design of future HTGRs: (1) performance degradation of helium gas compressors, (2) malfunction of the reserved shutdown system in the reactivity control system, (3) problems with emergency gas turbine generators, and (4) consequences of the Great East Japan Earthquake.

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Section: Trends In Registered Eventsmentioning

confidence: 99%

Operation and maintenance experience from the HTTR database

Shimizu

Furusawa

Homma

et al. 2014

Journal of Nuclear Science and Technology

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“…This reactor has set goals for helium coolant purity (Sakaba 2004) The HTTR uses a pre-charcoal trap, an inlet heater, two copper oxide fixed beds, gas coolers, two molecular sieve traps, two cold charcoal traps, and small gas circulators to cleanse the helium gas. Dual units provide the ability to regenerate or service equipment while the system remains on line.…”

Section: Related Operating Experiences Supporting the Fmeamentioning

confidence: 99%

Preliminary Failure Modes and Effects Analysis of the US DCLL Test Blanket Module

Cadwallader¹

2007

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“…Therefore, it is expected that hydrogen transfers to the primary cooling system and mixes in the helium coolant. This extra source of hydrogen produced by the IS process makes it more complicated to control the hydrogen concentration within 3 volume-ppm, which is specified in the operation procedures of the HTTR [9]. In order to connect the hydrogen production system to the HTTR, it is necessary to evaluate quantitatively the amount of hydrogen that permeated through the IHX and the iodine cycle of the IS process.…”

Section: Introductionmentioning

confidence: 99%